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Business Combination (Details Textual) - USD ($) |  | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Oct. 07, 2016 | Jun. 30, 2018 | Dec. 31, 2017
Business Combination (Textual) |  |  |
Merger, description | The former shareholders of A.V.M. Software, Inc. received shares of PeerStream, Inc.’s common stock representing approximately 77.9% of the outstanding shares of common stock of the post-AVM Merger combined company, and PeerStream, Inc.’s former shareholders retained approximately 22.1% of the outstanding shares of common stock of the post-AVM Merger combined company, in each case including shares of unvested restricted stock in the total number of shares of PeerStream, Inc. common stock outstanding. |  |
SNAP shares |  |  | 1,486,298
Market share price |  |  | $ 5.60
Fair value of deferred revenue |  | $ 3,830,155 | $ 234,144
Decrease in deferred tax liability |  |  | 1,452,339
Amortization of deferred revenue |  |  | $ 65,000

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- Definition Amount of deferred revenue recognized for transactions arising during the current reporting period. Deferred revenue is a liability as of the balance sheet date related to a revenue producing activity for which revenue has not yet been recognized. Generally, an Entity records deferred revenue when it receives consideration from a customer before achieving certain criteria that must be met for revenue to be recognized in conformity with GAAP. + References No definition available. + Details
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